METHOD OF REPAIRING FOUNDATION STRUCTURE

• Main Authors: KAWAMURA KOICHI, NEGISHI YASUAKI, SUZUKI SUEO, TANAKA HATSUICHI, OKADO MASANORI, ONISHI TOMOHARU
• Format: Patent
• Language: English
• Published: 16.06.2011
• Subjects: EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

PROBLEM TO BE SOLVED: To provide a method of repairing a foundation structure capable of performing the permanent repair of the partial unevenness of a concrete board without accompanying a major construction work such as disassembling. SOLUTION: In this repair method, a deformed portion 40 such as a step or a slope produced in a foundation structure on a ground is recovered by injecting a foam material 9 to the lower part of the deformed portion for foam expansion. The method includes a hole forming step of forming an insertion hole which extends through the deformed portion 40 and allows a rod 7 for injection to extend therethrough, a solidified body building step of building a solidified body 8 just below the deformed portion 40 by inserting and extracting the rod 7 into and out of the ground through the insert hole and injecting a solidification material from the front end of the rod, and a correcting step of recovering the deformed portion 40 to a surface generally flush with the non-deformed portion by an expansion according to the foaming of the foam material by injecting the foam material 9 in the gap set between the deformed portion 40 and the solidified body 8 to provide a reaction force to the upper part of the solidified body. COPYRIGHT: (C)2011,JPO&INPIT